J21.9

Billable

Acute bronchiolitis, unspecified

J21.9 is the ICD-10-CM code for Acute bronchiolitis, unspecified. It is a billable, specific code valid for reimbursement.

Status
Billable
Chapter
J00-J99
Parent
J21
Edition
FY2026

J00-J99 Diseases of the respiratory system

Includes

  • Bronchiolitis (acute)

Excludes1 — not coded here

  • chronic bronchiolitis (J44.89)

Frequently asked questions

What is ICD-10 code J21.9?
J21.9 is the ICD-10-CM code for "Acute bronchiolitis, unspecified". It falls under J00-J99 Diseases of the respiratory system.
Is J21.9 a billable code?
Yes — J21.9 is a billable, specific ICD-10-CM code valid for reimbursement.
What is excluded from J21.9?
Excludes1 (not coded here): chronic bronchiolitis (J44.89).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

Look up another ICD-10 code or condition

Powered by Eleplan

Free ICD-10 lookup is just the start. Eleplan keeps the whole care plan in one place.

Diagnoses, medications, documents, appointments, and the whole care team — organized and always in sync, with Ellie, your AI care assistant, on top of it. Free to start.